<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>使用解构赋值使两个变量的值进行交换</title>
</head>
<body>
  <script>
    let a = 10, b = 20;
    [a, b] = [b, a]
    console.log('a是:' + a, 'b是:' + b)
  </script>
</body>
</html>